[sebhc] The 8-bit Runt of the Litter: ET-3400 - Manual posted

Jack Rubin jack.rubin at ameritech.net
Tue Sep 7 18:13:31 CDT 2004

Thanks Scott -

It's in the documents/hardware/ET340x directory as


> -----Original Message-----
> From: sebhc at sebhc.org [mailto:sebhc at sebhc.org] On Behalf Of 
> Scott LaBombard
> Sent: Tuesday, September 07, 2004 2:45 PM
> To: sebhc at sebhc.org
> Subject: Re: [sebhc] The 8-bit Runt of the Litter: ET-3400
> Paul/Jack,
> I've just posted a scan of a more recent iteration of the 
> ET-3400[A] modification kit documentation. It includes 
> sections for both the original ET-3400 (Part 1 of the 
> document) and the ET-3400A (Part 2 of the document). Also 
> included (and just acquired 2 weeks ago) is the ellusive 
> pictorial fold-out ...but only for Part 1 (the original 
> ET-3400). I do not have the pictorial fold-out for Part 2 (ET-3400A).
> To determine which ET-3400 you have, simply look at the 
> number of RAM chips installed. If you have 4, then you have 
> the earlier ET-3400. Everthing you need is included in the 
> document posted. If you have 2 RAM chips ...you have the 
> newer ET-3400A (and you will need to find the missing 
> pictorial fold-out somewhere else).
> As interesting ...if anyone can determine a suitable 
> replacement for the GD510 diode required to modify the 
> ET-3400, then I would sure like to hear about it. I can't 
> find any info or cross-reference data on it. The modification 
> for the newer ET-3400A doesn't require any parts (other than 
> a ribbon cable, and a homemade foil RF shield).
> Enjoy ...
> Scott
> --
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